RU204976U1 - CELLULAR PANEL END SUPPORT UNIT - Google Patents

Abstract

The utility model relates to the field of aerospace engineering and can be used to create honeycomb panels, which have units for fastening structures, devices and equipment to their surface. The technical problem to be solved by the claimed utility model is to improve manufacturability in the manufacture of the end support unit insert The specified technical problem is solved due to the fact that the end support unit of the honeycomb panel contains an insert with fastening holes located at the end of the honeycomb panel, glued into the cutout of the honeycomb filler between the upper and lower skins, while the insert is made with internal cavities bounded by lateral edges for gluing into a honeycomb panel and bodies designed to accommodate fastening holes in them, so that the insert has internal cavities on the side of the insert gluing to the honeycomb core, overlapped by fins, which are fixed on the insert before gluing it into the honeycomb panel, for example, using glue, while the number of internal cavities made on the side of gluing the insert to the honeycomb core can vary depending on the production need. manufacturability in the manufacture of an insert due to the execution of internal cavities on either side, a decrease in labor intensity in the execution of bodies and, as a result, an improvement in the design of the end support unit.

Description

The utility model relates to the field of aerospace engineering and can be used to create honeycomb panels that have nodes for fastening structures, instruments and equipment to their surface.

Known end support unit containing an insert with fixing holes located at the end of the honeycomb panel, glued into the cutout of the honeycomb filler between the upper and lower skins (US patent 7167631 B2).

The disadvantage of this device is the increased mass of the end support unit, due to the fact that the insert is made as a monolithic part. Also, the disadvantages include the impossibility of attaching the interface elements to other surfaces of the honeycomb panel, in addition to the end, and the small area of the insert gluing to the upper and lower skins, which causes a low load-bearing capacity of the insert.

As a prototype, the end support unit of the honeycomb panel, presented in the patent RU 200699 U1, was chosen, containing an insert with fastening holes located at the end of the honeycomb panel, glued into the cutout of the honeycomb filler between the upper and lower skins, while the insert is made with internal cavities bounded by the lateral faces for gluing into a honeycomb panel and bodies designed to accommodate mounting holes in them.

The disadvantage of the prototype is the low manufacturability of inserting the end support unit of the honeycomb panel, since it becomes necessary to use expensive special tools and equipment for making internal cavities in the insert, due to the fact that the tool can only enter from one side, as well as the side faces of this tool , which separate the inner cavity of the end support unit of the honeycomb panel from the honeycomb core, and do not allow the adhesive bond to get into the inside of the insert. For the same reasons, the complexity increases in the execution of the bodies in the inner cavity of the insert, that is, the necessary local thickenings of the material from which the insert is made to accommodate the fastening holes in them.

For the claimed device, the following essential features common to the prototype have been identified:

- end support unit of the honeycomb panel;

- honeycomb panel, consisting of upper and lower skins and honeycomb filler between them;

- the presence of a cutout in the honeycomb filler;

- insert with mounting holes installed in the cutout;

- the insert is glued into the cutout of the honeycomb panel between the upper and lower skins;

- the insert has internal cavities bounded by lateral edges for gluing into the honeycomb panel and by bodies intended to accommodate fastening holes in them.

The technical problem to be solved by the claimed utility model is to improve manufacturability in the manufacture of the insert of the end support unit, as well as to improve the design of the end support unit.

The specified technical problem is solved by the design of the end support unit of the honeycomb panel, containing an insert with fastening holes located at the end of the honeycomb panel, glued into the cutout of the honeycomb core between the upper and lower skins. In this case, the insert is made with internal cavities bounded by lateral edges for gluing into a honeycomb panel and bodies designed to accommodate fastening holes in them. The insert has internal cavities on the side where the insert is glued to the honeycomb core, covered with plates, which are fixed on the insert before gluing it to the honeycomb panel, for example, using glue.

The essence of the claimed technical solution is illustrated by two drawings:

fig. 1 is a projection view of an end support assembly with plates;

fig. 2 is a cross-section of an end support assembly with plates in a plane;

fig. 3 - insert installed in the honeycomb panel.

The end support assembly consists of an insert 1 containing internal cavities 2 and a body 3 on its surface (see Fig. 1-2). Internal cavities 2 located on the side of gluing the insert 1 to the honeycomb core 9 are overlapped by the plates 4, while the plates 4 are fixed on the insert 1, for example, using glue (arrows show the direction of installation of the plates 4). In this case, the number of internal cavities 2 may vary depending on the production need.

Internal cavities 2 and bodies 3 are formed during the production of the end support assembly, for example, by milling.

FIG. 3 shows the end support assembly installed in the honeycomb panel 5. Thanks to the plates 4 fixed on the insert 1, when the insert 1 is glued into the honeycomb panel 5, the adhesive joint does not get into the inner cavities of the insert 1, and the load-bearing capacity of the insert 1 does not decrease. For this, fastening holes 6 are made on the bodies 3 of the end support unit, intended for fastening structures, instruments and equipment (not shown in Fig. 3).

The assembly of the end support assembly is carried out sequentially. In the insert 1, internal cavities 2 and bodies 3 are made. Internal cavities 2 from the side of the end of the honeycomb panel remain open, and from the side of gluing the insert to the honeycomb core 9, they are covered with plates 4. The plates 4 are fixed on the insert 1, for example, with glue, in front of by gluing into the honeycomb panel 5. After that, the insert 1 is glued into the cutout of the honeycomb filler 9 of the honeycomb panel 5 between the skins 7 and 8. Then the insert 1 is machined to make fastening holes 6 in the bodies 3.

The technical result when using the end support unit is to increase the manufacturability in the manufacture of the insert, due to the execution of internal cavities on either side, to reduce the labor intensity when performing the bodies and, as a result, to improve the design of the end support unit.

Claims (2)

1. End support unit of the honeycomb panel, containing an insert with fastening holes located at the end of the honeycomb panel, glued into the cutout of the honeycomb filler between the upper and lower skins, while the insert is made with internal cavities bounded by lateral edges for gluing into the honeycomb panel and bodies, designed to accommodate mounting holes in them, characterized in that the insert has internal cavities on the side where the insert is glued to the honeycomb core, covered with plates that are fixed on the insert before gluing it into the honeycomb panel. 2. The end support assembly of the honeycomb panel according to claim 1, characterized in that the plates are fixed to the insert by means of glue.

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